Abstract: Aiming at the problems of the low utilization rate of the pressure energy in the natural gas pipeline network and the instability of energy system caused by the fluctuation of energy load, an optimal dispatching method of integrated electricity-heat-gas energy systems considering the power generation technology of the natural gas pipeline pressure energy is proposed. Firstly, this paper establishes a natural-gas-pressure-energy power generation model through the exergy analysis, and then proposes a quasi-dynamic pressure energy power generation model based on the control technique for the linepack of natural gas. Combining the model with the energy equipment models the architecture including the electricity-heat-gas energy and the pressure energy in natural gas pipeline is built. Considering the incentive of the time-of-use prices, this system may achieve the results of peak load shifting and the economical operation for the power load. By introducing the test case, analyzing and comparing the costs of system operating, the fluctuations of net load of the system and the outputs of each energy equipment under three scenarios, it is verified that this optimal dispatching method in this paper can improve the fluctuation of net load and reduce the cost of system operating.